Comparison

Kata Calc vs Simple Karate Scoreboard

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Kata Calc

Features
Read full description

Kata Calc is an iPhone application to caluculate WKF (World Karate Federation) Karate Kata Competition in old rule (point system).

About

Simple Karate Scoreboard

This app provides a simple and intuitive scoreboard for karate matches. It features customizable themes, player name input, point and penalty tracking, a timer, and a "Senshu" indicator for the first point. Easily reset scores and fouls from the settings menu.

Highlights
  • Customizable themes (Theme 1 & Theme 2)
  • Player name input
  • Add/subtract points
  • Penalty tracking (C1/C2)
  • Adjustable timer (2 or 3 minutes)
  • Senshu indicator
  • Reset scores and fouls
Features
Read full description

A scoreboard app for karate. It is easy to use and has simple operations. It also has a SENSHU indicator(the indicator that gets first point) and you can set the timer. ● Basic functions 1 . Theme You can choose from two themes, "Theme 1" and "Theme 2", on the setting screen. Theme 1 has a "+" button for the scoring method, while Theme 2 has "Ippon", "Waza-ari", and "Yaku" buttons. 2. Player name Tap "Player1" or "Player2" on the screen to enter the player's name. 3. Adding and subtracting points You can add or subtract points by tapping the button next to the score. You can also add points by tapping the score. 4. Penalties (C1/C2) Tap a number to increase the number of penalties by one. If you press the number by mistake and want to decrease the number of penalties by one, press and hold the number to decrease it. 5. Timer Tap the time to start the timer. If you want to stop it, tap it again. You can set the timer time to either "2 minutes" or "3 minutes" in the settings screen. 6. Take first(SENSHU) When one of the players gets a point first, a yellow circle will be displayed on the score of that player. If you want to cancel the preemptive score due to a foul, tap the yellow circle. 7. Reset Tap the gear icon at the bottom center of the screen to display the menu, where you can reset the score, timer and foul count. ● Privacy Policy https://apps.seeds-digital.com/privacy-policy/ ● Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Kata Calc1 screens
Simple Karate Scoreboard2 screens

Verdict

The call

The clearest difference is in-app purchases: Kata Calc at none against Simple Karate Scoreboard's 3. Kata Calc also leads on ads (none vs shown) and iOS requirement (9.3 vs 15.6). Simple Karate Scoreboard's advantage is update cadence (every 2 months vs every 7 months). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Simple Karate Scoreboard sells 3 in-app purchases, starting at $0.99 per month. Kata Calc asks for nothing beyond the download.

UpkeepUpdate frequency

Kata Calc ships an update every 7 months, Simple Karate Scoreboard every 2 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Kata Calc versus Simple Karate Scoreboard: the parameters behind the verdict, then further details
ParameterKata CalcSimple Karate Scoreboard
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—83.3% of reviews
Number of ratings—3 — better
Update frequencyEvery 7 monthsEvery 2 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.3 — better15.6
Further details — not scored
Size2 MB41 MB
Age rating4+4+
Developerokashige0319NAOYA ONO

In-app purchases

None

Kata Calc

No in-app purchases

3 purchases

Simple Karate Scoreboard

Subscriptions1
  • Premium Plan$0.991 Month
One-time2
  • Support Developer$0.99
  • Remove ads$24.99

Questions

Is Kata Calc free?
Kata Calc is free to download, with no in-app purchases.
Is Simple Karate Scoreboard free?
Simple Karate Scoreboard is free to download, with in-app purchases available.
Do Kata Calc or Simple Karate Scoreboard have ads?
Simple Karate Scoreboard shows ads; Kata Calc does not.
Which is updated more often, Kata Calc or Simple Karate Scoreboard?
Kata Calc ships an update every 7 months, and Simple Karate Scoreboard every 2 months. Most recently, Kata Calc was updated on November 4, 2026 and Simple Karate Scoreboard on November 3, 2026.

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